Air-jacket for cylinders of engines.



No. 859,205. PATENTED JULYQ, 1907. P. DANIELSON & 0. ORONWELL. AIRJACKET FOR CYLINDERS 0F ENGINES.

APPLIOATI-ON FILED 00127, 1904,. V I

UNlTED STATES ATENT orrron.

FRANK DANIELSON AND orro ORONWELL, OF CHICAGO, ILLlNOIS.

AIR-JACKET FOB CYLINDERS OF ENGINES.

Specification of Letters Patent. I

Patented July 9,- 1907.

Application filed October 27,1904. Serial No. 230,213,

7, To all whom it may concern:

Be it. known that we, FRANK DANIELSON and Or'ro ORoNwELL, both citizensof the United States, and residents of Chicago, in the county of Cookand State of Illinois, have invented certain new and useful Im-,

air around them. This we accomplish by the means hereinafter fullydescribed, and as particularly pointed out in the claims. p v v Thedrawings represent a vertical central section through the cylinder andparts of a gas engine cooperating therewith showingour improvementsapplied thereto.

In the drawings, .A represents the cylinder of a gas engine of theusual-construction and B representsthe piston reciprocating therein,which, through the medium of a pitman a operates the crank O, and,

through the latter actuates and revolves the hori zontal shaft D. Thegeneral construction and operation of all of these parts are the same asin any ordinary gas-ngineyand .during the operation thereof thecylinder,.unless' kept cool, becomes very hot.

.O1ir improvements for ridding the cylinder of this heat comprise an airjacket which consists of a series.

of corresponding circular rings d, d, d, d, which are preferably made ofangular shaped metal and are of such dimensions that they snugly fitover the cylinder A, one above the other, with the inner edges of theirinturned 'fianges in contact with the sides of the cylinder, and theirvertical portions bounded by the same vertical plane, and forming atight compact wall from top to bottom. The lowermost ring d of theseries is, preferably, supported upon a circumferential flange eprojecting from cylinder A, near its lower end, and there are a number,say five, of these rings, each supporting the one above it, between theflange e, and the projecting flanged circumferential edge 1" of the headE, closing the upper end of the cylinder.

Flange f of head E closes the space betweenthe side of the cylinder andthe top edge of the vertical portion oi the uppermost ring d, and thuscompletes a series of annular air chambers surrounding the cylinderbetween flange e and the top of the cylinder. These annular air chambersare constructed'independent of each other if desired, and, in this eventthe circumar'nbient air in these chambers constitutes a cooling-jacket,which'contributes to keep the outer circumferential sides of jacketcomparatively ;cool because of the circulation of. air as willbehereinafter more fully described, while the heat of the cylinder iscarried by their horizontal portions to the outer circumference of thejacket and there dissipated. Inorder to accomplish this result, however,it is desirable to make the rings of some metal which is a better condlctor of heat than the castiron or steel of which the cylinder is made,and for this reason we with a series of holes g, g, and likewise providethe flange f of head Ewith holes h,-and then'pump air into the lowermostannular air chamber and thus keep a continual current of airpassingthrough the said series of chambers from bottom to top. Ifdesired an air pump may be employed for this purpose 1 which will beentirely independent of the engine. We preier, however, to inclose thecrank O and pitman a of the engine in an air-tight case G which supportsand is open to the lower end of cylinder A and to connect the interiorof the chamber thus formed with the lowermost annular chambersurrounding the cylinder A by pipes H, H. Thus constructed during thedownward movement of the piston the air will be forced out of the crankchamber to and out of the annular air chambers surrounding the cylinder,and during the up-stroke of the piston the air ,will be drawn into saidcrank chamber. If said crankchamber has no air inlet the air willsimply'be inhaled and exhaled from the annular chambers of'theair-jacket; if however, it has a. valve controlled inlet, such as shownat I in the drawings, the air will be drawn into'the crank chamberduring the up-stroke, and forced out of said annular chambers during thedownstroke of theIpiston.

What we claim as new is: i

1. Iris cngine, an air-jacket consisting of'ja plurality ofangular-shaped rings, the vertical portions of which form the outer wallof said jacket and are provided with a series of outwardly projectingcircumferential fl'anges, the inner portions of said rings at rightangles to the vertical portions thereof forming partitions that dividethe dutcrior of said jacket into a like number of compartments, and aseries of openings in said partitions which provide the circulation ofair through said compartmen 2. In an engine, an air-jacket consisting ofa'plurality' of rings, the vertical portions of which form the outerwall of said jacket and are provided with a series of out wardlyprojecting circumferential flanges theinner portions of said rings atright angles to the vertical portions: thereof forming partitions thatdivide the interior of said jacket into a like number of compartments,0. series of openings in said partitiouswhich provlde the circulation ofair through said compartments, and means for forcingthe air from thecrank-chamber to and through said compartments.

3. In an engine, an air-jacket comprising a series of rings surroundingthe cylinder, each provided with an inturned flange having a. pluralityof openings therein and a series of circumferential flanges projectingfrom the outer circumference of said rings, said rings communicatingwith each other and providing chambers for the circulation' of air.

4. In an engine an air-jacket comprising a series of rings surroundingthe cylinder, each provided with an inturned flange having a pluralityof openings therein and a season series of circumferential flangesprojecting from the outer circumferenceh of said rings, said ringscommunicating 15 this 5th day of February, 1903.

FRANK DANIELSON. OTTO CRONWELL.

Witnesses I FRANK D. THOMASON, E. K. LUNDY.

